Weldless laminar flow hood

Abstract

The utility model relates to a welding -free laminar flow hood body, including box and setting in the static pressure cover of box, the box includes the side plate of setting vertically around static pressure cover and the top plate of setting in the top of static pressure cover, between adjacent side plate and between side plate and top plate respectively opposite setting hem, adjacent hem each other overlap mechanical connection and fill sealant, the bottom of side plate sets up the lower hem towards the side of static pressure cover, the lower hem includes setting in the inside support section of box, the upper surface of support section contacts the bottom of static pressure cover, the lower surface of support section is filter mounting surface, filter mounting surface bonding connection high -efficient filter device, the utility model discloses through mechanical connection, sealant and bonding connection assembly laminar flow hood, can complete the assembly of laminar flow hood without welding, simplifies laminar flow hood assembly process and significantly reduces the cost.

Description

Technical Field

[0001] This utility model relates to the field of laminar flow hood technology, and in particular to a weld-free laminar flow hood body. Background Technology

[0002] A laminar flow hood is an air purification device that provides unidirectional airflow and creates a localized high-cleanliness area in a low-cleanliness environment, which can isolate or control pollution.

[0003] When a laminar flow hood is in operation, air is drawn into the chamber from a relatively clean area. After preliminary filtration, the air is forced into the static pressure hood, filtered by a high-efficiency filter, and then discharged, creating a localized high-cleanliness area at the discharge point. If the laminar flow hood's sealing performance is substandard during operation, heavily contaminated gas may enter the chamber, or unfiltered gas may directly enter the static pressure hood, affecting the cleanliness of the gas discharged from the laminar flow hood.

[0004] To ensure the sealing performance of the laminar flow shield, the joints between the various panels are welded together using a full-welding process. However, this process has a long production cycle, high labor costs, and high equipment investment, increasing the production cost of the laminar flow shield. Furthermore, the subsequent processing steps, such as grinding and wire drawing, further increase the production cost.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a weld-free laminar flow hood to simplify the production of laminar flow hoods.

[0007] The technical solution of this utility model is as follows: The weld-free laminar flow hood includes a housing and a static pressure hood housed within the housing. The housing includes side panels vertically arranged around the static pressure hood and a top plate positioned on top of the static pressure hood. Folded edges are provided between adjacent side panels and between the side panels and the top plate, facing each other. Adjacent folded edges overlap and are mechanically connected and filled with sealant. A lower folded edge is provided at the bottom of the side panels facing the static pressure hood. The lower folded edge includes a support section located inside the housing. The upper surface of the support section contacts the bottom of the static pressure hood, and the lower surface of the support section serves as a filter mounting surface. A high-efficiency particulate air (HEPA) filter is bonded to the filter mounting surface.

[0008] A further technical solution involves bending the outer edge of the top of the side panel to form an upper folded edge, which is then bent multiple times to form an upper slot. The outer edge of the top panel is also bent to form a top folded edge. This top folded edge is fitted to the side wall of the upper slot.

[0009] A further technical solution involves providing a limiting segment at the end of the lower folded edge. The limiting segment is mechanically connected to the inner wall of the static pressure cover.

[0010] A further technical solution involves providing a fixing screw on the lower surface of the support section. A clamping block is threaded onto the fixing screw. A high-efficiency filter is positioned between the support section and the clamping block.

[0011] A further technical solution involves a static pressure cover comprising multiple plates. Folded edges are provided between adjacent plates. The folded edges of adjacent plates overlap and are mechanically connected, with sealant applied.

[0012] A further technical solution is that the mechanical connection includes riveting or screw connection.

[0013] A further technical solution is that the adhesive connection includes sticker connection and glue connection.

[0014] A further technical solution involves placing the sticker at the support position of the adjacent support segment.

[0015] A further technical solution involves opening ventilation openings on a side plate and the top of the static pressure cover.

[0016] The beneficial technical effects of this utility model are as follows: (1) In the weld-free laminar flow hood of this utility model, folded edges are respectively arranged facing each other between adjacent side plates and between adjacent side plates and the top plate. The overlapping arrangement of the folded edges significantly increases the path length of air when it seeps in along the splicing position, thereby reducing the sealing performance of the splicing position. The overlapping arrangement of the folded edges also increases the contact area at the splicing position, thereby enhancing the stability of the connection between side plates and between side plates and the top plate, reducing the vibration of the side plates and the top, and reducing the sealing failure caused by vibration displacement. Moreover, the folded edges facing each other are mechanically connected and filled with sealant. The mechanical connection fixes the relative position, and the sealant fills the gap at the overlapping position to form a continuous sealing barrier, ensuring the sealing performance of the splicing position of the housing. In addition, the filter mounting surface and the high-efficiency filter device are bonded together to fix the position of the high-efficiency filter device and ensure the sealing performance between the filter mounting surface and the high-efficiency filter device. The space between the housing and the static pressure hood is adjusted to have different air inlet and outlet rates, which is a negative pressure space, which can prevent the air between the housing and the static pressure hood from flowing into the static pressure hood along the gap between the support section and the static pressure hood. The laminar flow hood is assembled using mechanical connections, sealants, and adhesives, eliminating the need for welding and simplifying the assembly process to significantly reduce costs.

[0017] (2) Further, the upper folded edge is bent multiple times to form an upper groove. The top folded edge extends into the upper groove and fits the side wall of the upper groove, increasing the path length when air seeps in along the splicing position. At the same time, the upper folded edge supports the top plate through the upper groove.

[0018] (3) Further, the limiting section contacts the inner wall of the static pressure hood, and the limiting sections of multiple side plates cooperate to completely position the lateral position of the static pressure hood and align the static pressure hood and the high-efficiency filter device. Attached Figure Description

[0019] Figure 1 A three-dimensional structural schematic diagram of a weld-free laminar flow hood according to an embodiment of the present disclosure is shown.

[0020] Figure 2 An exploded structural diagram of a weld-free laminar flow hood according to an embodiment of the present disclosure is shown.

[0021] Figure 3 A bottom view structural schematic diagram of a weld-free laminar flow hood according to an embodiment of the present disclosure is shown.

[0022] Figure 4 A cross-sectional view of a weld-free laminar flow hood according to an embodiment of the present disclosure is shown at point A.

[0023] Figure 5 A partially enlarged view of point B is shown of a weld-free laminar flow hood according to an embodiment of the present disclosure.

[0024] Figure 6 A partially enlarged view of the weldless laminar flow hood at point C is shown according to an embodiment of the present disclosure.

[0025] Marked in the attached diagram: 1. Housing; 2. Side panel; 21. Upper folded edge; 211. Upper slot; 22. Lower folded edge; 221. Support section; 222. Filter mounting surface; 223. Sticker; 224. Limiting section; 225. Fixing screw; 226. Pressing block; 3. Top plate; 31. Top folded edge; 4. Static pressure cover; 41. Plate; 411. Plate folded edge; 42. High-efficiency filter device. Detailed Implementation

[0026] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0027] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Figure 1 A three-dimensional structural schematic diagram of a weld-free laminar flow hood according to an embodiment of the present disclosure is shown. Figure 2 An exploded structural diagram of a weld-free laminar flow hood according to an embodiment of the present disclosure is shown. Figure 3 A bottom view structural schematic diagram of a weld-free laminar flow hood according to an embodiment of the present disclosure is shown. Figure 4 A cross-sectional view of a weld-free laminar flow hood according to an embodiment of the present disclosure is shown at point A. Figure 5 A partially enlarged view of point B is shown of a weld-free laminar flow hood according to an embodiment of this disclosure. Please refer to... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The weld-free laminar flow hood includes a housing 1 and a static pressure hood 4 disposed within the housing 1. The housing 1 includes side plates 2 vertically arranged around the static pressure hood 4 and a top plate 3 disposed on top of the static pressure hood 4. Folded edges are arranged facing each other between adjacent side plates 2, and between side plates 2 and the top plate 3. Adjacent folded edges overlap and are mechanically connected and filled with sealant (not shown in the figure). The overlapping arrangement of the facing folded edges significantly increases the path length for air to infiltrate along the joint, thereby reducing the sealing performance at the joint. The overlapping folded edges also increase the contact area at the joint, thereby enhancing the stability of the connection between side plates 2 and between side plates 2 and the top plate 3, reducing vibration of the side plates 2 and the top, and reducing sealing failure caused by vibration-induced displacement. Furthermore, the mechanical connection and sealant filling between the facing folded edges fix their relative positions, and the sealant fills the gaps at the overlapping positions, forming a continuous sealing barrier to ensure the sealing performance of the housing 1 at the joint. Butyl putty can be used as the sealant, which is easy to disassemble and facilitates maintenance of the laminar flow hood. A lower folded edge 22 is provided on the bottom side of the side panel 2 facing the static pressure hood 4. The lower folded edge 22 includes a support section 221 disposed inside the housing 1. The upper surface of the support section 221 contacts the bottom of the static pressure hood 4, and the lower surface of the support section 221 is the filter mounting surface 222. The filter mounting surface 222 is bonded to the high-efficiency filter device 42, fixing the position of the high-efficiency filter device 42 and ensuring the sealing performance between the filter mounting surface 222 and the high-efficiency filter device 42. The space between the housing 1 and the static pressure hood 4 is adjusted to have different inlet and outlet air rates, creating a negative pressure space, which can prevent air from flowing into the static pressure hood 4 through the gap between the support section 221 and the static pressure hood 4. That is, the laminar flow hood can be assembled without welding through mechanical connection, sealant and adhesive connection, simplifying the assembly process of the laminar flow hood and significantly reducing costs.

[0029] Figure 6 A partially enlarged view of the weldless laminar flow hood of an embodiment of this disclosure at point C is shown. Please refer to... Figure 2 , Figure 5 and Figure 6 The outer edge of the top of the side panel 2 is bent to form an upper folded edge 21, which is bent multiple times to form an upper groove 211. The outer edge of the top panel 3 is bent to form a top folded edge 31. The top folded edge 31 is fitted to the side wall of the upper groove 211, increasing the path length for air to seep in along the splicing position. At the same time, the upper folded edge 21 supports the top panel 3 through the upper groove 211.

[0030] Preferably, a limiting segment 224 is also provided at the end of the lower folded edge 22. The limiting segment 224 is mechanically connected to the inner wall of the static pressure shroud 4. The limiting segments 224 of the multiple side plates 2 cooperate to completely position the lateral position of the static pressure shroud 4, aligning the static pressure shroud 4 and the high-efficiency filter device 42. The limiting segments 224 cooperate to completely fix the position of the static pressure shroud 4.

[0031] More preferably, a fixing screw 225 is also provided on the lower surface of the support section 221. A clamping block 226 is threaded onto the fixing screw 225. The high-efficiency filter device 42 is disposed between the support section 221 and the clamping block 226. By adjusting the position of the clamping block 226 along the fixing screw 225, the high-efficiency filter device 42 can be clamped, fixing the position of the high-efficiency filter device 42 while ensuring that the high-efficiency filter device 42 fits against the filter mounting surface 222, thus ensuring the seal between the high-efficiency filter device 42 and the filter mounting surface 222.

[0032] Please refer to Figure 2 and Figure 5 Mechanical connections, including riveting or screwing, are simple to operate, have low barriers to entry, and short production cycles, reducing labor costs and equipment investment, and significantly lowering the production cost of laminar flow hoods. Even if sealant is required, the overall cost is lower than welding.

[0033] Preferably, the adhesive connection includes sticker 223 connection and glue application connection. The glue application connection can use a silicone-based sealant to form a liquid seal barrier. The sticker 223 provides initial positioning; firstly, the filter mounting surface 222 and the HEPA filter 42 are bonded together using the sticker 223, and then the glue is applied to rigidly connect the filter mounting surface 222 and the HEPA filter 42. This simplifies the installation process between the filter mounting surface 222 and the HEPA filter 42 and ensures the connection strength and sealing performance between them. The sticker 223 also prevents the HEPA filter 42 from directly rubbing against the filter mounting surface 222, extending the service life of the support section 221.

[0034] More preferably, the sticker 223 is placed at the support position of the adjacent support section 221 to further connect the adjacent support section 221 while bonding the filter mounting surface 222 and the high-efficiency filter device 42, thereby ensuring the stability of the connection between the adjacent support sections 221.

[0035] Please refer to Figure 2 and Figure 5 The static pressure cover 4 comprises multiple plates 41. A flange 411 is provided between adjacent plates 41. The adjacent flanges 411 overlap and are mechanically connected, with sealant applied. The mechanical connection fixes the relative positions of the adjacent plates 41, and the sealant fills the gaps at the overlapping positions, forming a continuous sealing barrier to ensure the sealing performance of the plate 41 joints. Ventilation openings are respectively provided on one side plate 2 and the top of the static pressure cover 4 for airflow.

[0036] The assembly process of this utility model is as follows: (side plate 2, static pressure cover 4, top plate 3, high-efficiency filter device 42) First, assemble adjacent side panels 2, aligning and fitting the folded edges (not shown in the diagram) between adjacent side panels 2. Connect the fitted folded edges with rivets or screws, and fill the splicing area with sealant. Align and fit the folded edges 411 between adjacent panels 41, and connect the fitted folded edges 411 with rivets or screws to form the static pressure cover 4. Then move the static pressure cover 4, with its lower surface contacting the upper surface of the support section 221, and its inner wall contacting the limiting section 224. Connect the static pressure cover 4 and the limiting section 224 with rivets or screws. Move the top plate 3 above the static pressure cover 4, with its top folded edge 31 extending into the upper slot 211. The top plate 3 folded edge fits against the side panel 2 of the upper slot 211 and abuts against the bottom of the upper slot 211. Connect the top plate 3 folded edge and the upper folded edge 21 with rivets or screws. The assembly of the laminar flow cover is now complete.

[0037] The installation of the high-efficiency filter device 42 is performed before installing the static pressure cover 4 onto the support section 221. First, remove the fixing block from the fixing screw 225 and attach the sticker 223 to the filter mounting surface 222. The sticker 223 adheres to the filter mounting surface 222 and the high-efficiency filter device 42, initially positioning the high-efficiency filter device 42. Then, apply adhesive between the filter mounting surface 222 and the high-efficiency filter device 42, and thread the clamping block 226 onto the fixing screw 225. Adjust the position of the clamping block 226 along the fixing screw 225 until the clamping block 226 engages with the filter mounting surface 222 to tighten the high-efficiency filter device 42, completing the installation of the high-efficiency filter device 42.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A weld-free laminar flow hood, characterized in that, The weld-free laminar flow hood includes a housing and a static pressure hood disposed within the housing. The housing includes side plates vertically arranged around the static pressure hood and a top plate disposed on the top of the static pressure hood. Folded edges are respectively provided facing each other between adjacent side plates and between the side plates and the top plate. Adjacent folded edges overlap and are mechanically connected and filled with sealant. A lower folded edge is provided at the bottom of the side plates facing the static pressure hood. The lower folded edge includes a support section disposed inside the housing. The upper surface of the support section contacts the bottom of the static pressure hood, and the lower surface of the support section is a filter mounting surface. The filter mounting surface is bonded to the high-efficiency filtration device.

2. The weld-free laminar flow hood as described in claim 1, characterized in that: The outer edge of the top of the side plate is bent to form an upper folded edge, which is bent multiple times to form an upper slot; the outer edge of the top plate is bent to form a top folded edge; the top folded edge is fitted to the side wall of the upper slot.

3. The weld-free laminar flow hood as described in claim 1, characterized in that: The end of the lower folded edge is also provided with a limiting segment; the limiting segment is mechanically connected to the inner wall of the static pressure cover.

4. The weld-free laminar flow hood as described in claim 1, characterized in that: The lower surface of the support section is also provided with a fixing screw; a clamping block is threadedly connected to the fixing screw; the high-efficiency filter device is disposed between the support section and the clamping block.

5. The weld-free laminar flow hood as described in claim 1, characterized in that: The static pressure cover comprises multiple plates; a plate fold is provided between adjacent plates; the adjacent plate folds overlap and are mechanically connected and sealed with sealant.

6. The weld-free laminar flow hood as described in claim 1, characterized in that: The mechanical connection includes riveting or screwing.

7. The weld-free laminar flow hood as described in claim 1, characterized in that: The adhesive connection includes sticker connection and glue connection.

8. The weld-free laminar flow hood as described in claim 7, characterized in that: The sticker is placed at the support position adjacent to the support segment.

9. The weld-free laminar flow hood as described in claim 1, characterized in that: Ventilation openings are respectively provided on the top of one of the side plates and the static pressure cover.

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